note 72579 added to function.session-start

If you ever want to know whether a session is open or has already been closed (e.g. with session_write_close()) when you need to open one (in my case, writing a framework and, therefore, not controlling the session directly), I have been unable to find an official check. However, I did notice that session_start() has the following behaviour: * If the session has been open before but is now closed, when you call session_start() the $_SESSION array is reset to the content of the session. * If the session is already open, the $_SESSION array is left totally untouched. Therefore, I came up with the following (obviously assuming you have already tested $_SESSION exists): <?php $_SESSION['testMe']='test'; @session_start(); if(isset($_SESSION['testMe'])) { echo "Session was open\n"; unset($_SESSION['testMe']); } else echo "Session was closed\n"; ?> Until someone can tell me the 'official' way to do it, this seems to work. Just to save some confusion, $_SESSION, session_id() and the SID define all maintain their values after a session_write_close() so are of no use in identifying if a session is currently open or not. Hence this trick. ---- Server IP: 85.116.0.130 Probable Submitter: 84.92.17.57 ---- Manual Page -- http://www.php.net/manual/en/function.session-start.php Edit -- https://master.php.net/note/edit/72579 Del: integrated -- https://master.php.net/note/delete/72579/integrated Del: useless -- https://master.php.net/note/delete/72579/useless Del: bad code -- https://master.php.net/note/delete/72579/bad+code Del: spam -- https://master.php.net/note/delete/72579/spam Del: non-english -- https://master.php.net/note/delete/72579/non-english Del: in docs -- https://master.php.net/note/delete/72579/in+docs Del: other reasons-- https://master.php.net/note/delete/72579 Reject -- https://master.php.net/note/reject/72579 Search -- https://master.php.net/manage/user-notes.php